Spending commitment

The UK leadership of Nato’s Very High Readiness Joint Task Force will see 3,000 troops based in the UK and Germany join a 5,000-strong unit ready to move with as little as five days’ notice.

It will involve the 20th Armoured Infantry Brigade, an armoured infantry battle group from the 1st Battalion The Princess of Wales’s Royal Regiment and a light infantry battle group from the 1st Battalion Grenadier Guards.

The prime minister is also to announce that Britain is to extend the deployment of four RAF Typhoon fighters with the Baltic Air Policing Mission.

And Mr Cameron, who is to stand down in September following the UK vote to leave to EU, will use his final Nato summit to underline the government’s continuing commitment to meet the alliance’s target of spending 2% of GDP on defence.